Service-based message access layer frame and implementation method thereof

ABSTRACT

A service-based message access layer frame and an implementation method thereof are provided, relating to a technical field of software. After initiating a system, a controller parses a configuration file, initiates a database access service and initializes and initiates other components. After an application front end sends a request, a receiver receives the request of the application front end, translates the request into data in a consistent format and sends the data in the consistent format to a next handling module. An account password checker and a session processor, serving as main information handling modules of the frame, handle a client request and send the handled client request to the repeater. A repeater translates the handled data in the consistent format into data acceptable to an application back end and sending the data acceptable to the application back end to the application back end for a data handling by cloud. The present invention guarantees a security of a connection from the application front end to the application back end and an access speed and avoids a large technical developing workload. The present invention is applicable to an access service from the application front end to the application back end.

CROSS REFERENCE OF RELATED APPLICATION

This is a U.S. National Stage under 35 U.S.C 371 of the International Application PCT/CN2014/094335, filed Dec. 19, 2014, which claims priority under 35 U.S.C. 119(a-d) to CN 201410195515.1, filed May 9, 2014.

BACKGROUND OF THE PRESENT INVENTION

Field of Invention

The present invention relates to a technical field of software, and more particularly to a service-based message access layer frame and an implementation method thereof.

Description of Related Arts

With the expansion in the application scale of the cloud computing, for the various types of clients, the various types of front ends are connected to the back end. According to the different requirements, the front ends adopt different protocols for communicating, such as the common Http protocol, the compressed Http protocol for the mobile equipment communication, the various online video communication protocol, the conventional SOAP protocol and the RPC protocol, and even the customized communication protocol. When the front ends are connected to the back end, all of the front ends are required to be handled with the login management, the rights management and the behavior auditing. The above handlings are collectively called the access layer. Conventionally, the cloud computing application requires the independent development of the access layer, which has the following problems.

Firstly, all of the front ends are connected to the back end independently. It is failed to balance the access frequency of each front end. The sporadic large access amount of some front end leads to the excessive pressure on the back end, which influences the access speed of the other front ends.

Secondly, the independent account authentication is required for each front end; all of the front ends are connected to the same authentication database, posing the high security threat to the authentication database.

Thirdly, the access layer is developed for each front end, mostly in the repeated manner, which increases the workload of the developer.

SUMMARY OF THE PRESENT INVENTION

An object of the present invention is to provide a service-based message access layer frame to solve problems of different protocols, low security and high development workload of conventional application front ends.

Another object of the present invention is to provide a method for implementing the service-based message access layer frame to solve the problems of the different protocols, the low security and the high development workload of the conventional application front ends.

Accordingly, the present invention adopts the following technical solutions.

A service-based message access layer frame comprises a controller, a receiver, an account password checker, a session processor and a repeater, wherein:

the controller comprises a configuration file parser and a database access service; the controller is for initiating, initializing and coordinating the receiver, the account password checker, the session processor and the repeater;

the receiver is for receiving a request of an application front end in various forms; after receiving data in different formats, the receiver translates the received data in the different formats into data in a consistent format and then sends the data in the consistent format to the session processor;

the account password checker is for controlling and validating an access of the request of the application front end and thereafter sending the request to the repeater;

the session processor, serving as a main handling module of the whole service-based message access layer frame, is for handling the request of the application front end with a login management, a rights management, a behavior auditing, a log, a single sign-on and interface exposing; and

the repeater is for translating the handled data in the consistent format into data acceptable to an application back end, and then sending the data acceptable to the application back end to the application back end to be handled by cloud.

The request of the application front end comes from a web front end or a client of a customized application layer protocol.

A method for implementing the service-based message access layer frame comprises steps of:

(1) after initiating a system, parsing a configuration file, initiating a database access service, and initializing and initiating a receiver, an account password checker, a session processor and a repeater of the service-based message access layer frame by a controller;

(2) after an application front end sends a request, receiving the request of the application front end, translating the request of the application front end into data in a consistent format and sending the data in the consistent format to the session processor by the receiver;

(3) handling a client request and sending the handled client request to the repeater, by the account password checker and the session processor which serve as main information handling modules of the frame; and

(4) translating the handled data in the consistent format into data acceptable to an application back end, and then sending the data acceptable to the application back end to the application back end for a data handling by cloud, by the repeater.

A working process of the controller comprises steps of:

(a) reading and parsing the configuration file; initiating the receiver according to the configuration file, wherein the receiver is different in accordance with the different application front ends and depends on a communication protocol of the application front end;

(b) initiating the repeater, wherein the repeater is different in accordance with the different application back ends and depends on a communication manner of the application back end;

(c) initiating the database access service; initiating the account password checker with a connection provided by the database access service; and obtaining validation information of an account from a database; and

(d) finally initiating the session processor which has no session therein initially.

A handling logic of the controller is describes as follows.

A strategy assigned by the configuration file determines which modules the request passes through and how the request is handled. Once a problem occurs, a handling chain is stopped and the request is returned to the controller in advance. The controller, according to returned abnormal information, returns a response to the client request in advance through the receiver and finishes a request response.

The receiver, as a server, continually receives the request of the application front end and, after receiving, assigns a unique ID to each the request.

The session processor contains connection information from the different application front ends, wherein the connection information is called sessions.

Each session is distinguished by a unique ID, sessionId. Each application front end is assigned the sessionId after connecting to the message access layer frame for a first time and being checked by the account password checker. Subsequent connections of the application front end must contain the sessionId in the request.

A complete process of handling the request comprises steps of:

extracting the session ID from each request and checking whether the session ID already exists by the session processor;

if the session ID exists, namely that the session already exists, sending the session to the repeater;

if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication;

if the authentication is failed, directly returning an error code to the application front end without continuing sending the session;

if the authentication is passed, registering the session and returning success authentication information to the application front end; and

after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request.

The present invention has following benefits.

Firstly, the present invention is able to balance a load among the different application front ends and reduce a pressure of the application back end.

Secondly, the service-based message access layer frame serves as a sole access of each application, which improves security; moreover, the service-based message access layer frame combines management with accessing, isolates the application front ends from the application back end, and simplifies program logics of the application front ends and the application back end.

Thirdly, the present invention is able to reuse codes and reduce a workload of developing the access layer.

These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further illustrated with the accompanying drawing.

The FIGURE is a flow chart of a method for implementing a service-based message access layer frame according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to the FIGURE, according to a preferred embodiment of the present invention, a method for implementing a service-based message access layer frame is illustrated. After initiating a system, a controller invokes a configuration file to load initialization information. The initialization information is described with an xml file in the preferred embodiment as follows.

    <?xml version=“1.0” encoding=“UTF-8”?>     <access layer configuration file>      <frame configuration>       <database>        // access layer configuration information        //        <address>        <account>       </database>       <session management>        <longest non-interactive time>        <session life time>        <>       </session management>       <default initiated receiver>        <restful_receiver>         <port: 3242>         // others        <allow ip list>        <deny ip list>        <allow SSL ?>        <other access controll message>        </restful_receiver>        <restful_receiver>         <port: 1999>         // others        </restful_receiver>        <gtunnel>         <>        </gtunnel>       </default initiated receiver>      </frame configuration>      <function module>       // reading and handling by an access layer      <rights management>        <which jar>       <database table name> // being initialized with relevant data after being loaded into jar       <database table format description>        // whether describe or not (because the database table format can be handled independently in a handling module)?        // how to describe different strategies for different        interfaces?      </rights management>      <interface legitimacy checking module>           <>      </interface legitimacy checking module>      <auditing>       <configuring auditing module>       <defining auditing rules by the auditing module>      </auditing>      <load balancing>       // background server list       <>      </load balancing>      </function module>      <interface handling logic>       // sending configuration herein into a relevant processor by       the frame       <gcloud>        <>        </>       </gcloud>       <computer room management>       </computer room management>      </interface handling logic>      <background server>       //       <computer room management>        <interface description>         <name=“” params1=“” params2=“”>         <>         <>        </interface description>        <passing module>         // strategy description        </passing module>        <address>   // or automatically finding communication with a background subsystem by gt?        <internal access password>       </computer room management>       <gcloud>        <>       </gcloud>      </background server>     </access layer configuration file>

The controller initializes other components.

The controller initiates a receiver according to the configuration file, described as follows:

    // receiver container     class ReceiverList {     // maintaining a receiver instance, operating receiver threads and outputting receiver data     }     ReceiverList recvList = new ReceiverList( );     // segment of initializing the receiver     for (Receiver recv : ReceiverSetup_get_from_configuration     file) {     receiver = new MakeReceiver(recv);     receiver.init( );     recvList.push(receiver);// putting into the receiver container     }

Similarly, the controller initiates a repeater, wherein the repeater is different in accordance with different application back ends and depends on a communication manner of the application back end.

The controller positions a target background according to a type of the request of the application front end, so as to know to choose which repeater to transmit data.

The controller initiates a session processor as follows, wherein the session processor is empty initially.

class Session { // defining a session } SessionManager sessMan = new SessionManager( );

The controller initiates an account password checker, described as follows:

    AccountManager accMan = new AccountManager(configuration information extracted by the configuration file);     The controller has the following basic working process:     clientRequest = recvList.getClientReq( );     [

Different access layers receive original data requests in different formats. Thereafter, the access layers generate a data structure in a consistent format based on original data. The data structure flows in each module. The data structure is universal and recognizable. For example, when receiving a rest request of:

     http://domain.name/john?sessionid?requestid/hotel/liver/      ammount      the rest request is translated into the following data structure:      {     account: “john”,     sessionId: “as8d7fa98s7a98s7dfa7s9d8f7”,     requestId: ”7a6sd76a57s65f7ad”,     servicetype: “hotel”,     interface: “liver”,     params : [amount, ],     }     ]     // containing a session ID by each request of the application front end, including a registration request     if (! sessMan.existSession(clientRequest.WhatSession( ))) {     // if the session does not exist in the session processor, namely that the session is a new session, sending the session to the account password checker for checking     if (success == accMan.checkRequest(clientRequest)) {     Session sess = accMan.makeNewSession(clientRequest);     sessMan.put(sess);     // finishing session registration     // returning success information to the application front end     recvList.sendResponse(clientRequest, success);       [

The receiver destroys corresponding connection information after the recvList sends response information. The session has already been maintained by the session processor, wherein the receiver is not involved. The receiver is merely responsible for receiving and returning the request. Each request is independent and mutually unrelated. Thus, once the request is finished, the receiver eliminates the corresponding connection information and waits for a next request.

    ]     }     else {     // authentication failure     recvList.sendResponse(clientRequest, failure);     }     }     else {     // if the session already exists, sending the session to the session processor     handled_request = sessMan.handleReq(clientRequest);     // A strategy assigned by the configuration file determines which modules the request passes through and how the request is handled. Once a problem occurs, a handling chain is stopped and the request is returned to the controller in advance. The controller, according to returned abnormal information, sends a response to the application front end in advance through the receiver and finishes a request response. For example, the problem occurs in rights checking, a response of “error: get my age access denied” is returned to a client     ]     if (check(handled_request) == error) {     response = make_response(handled_request);     recvList.sendResponse(clientRequest, response);     }     else {     // sending the request to the repeater which sends the request to the back end and returning the response     response = transManager(handled_request)     recvList.sendResponse(clientRequest, response);     }     }

The receiver accepts information of various protocols and thus a plurality of implementation methods exist. An Http REST protocol is taken as an example to illustrate the implementation. The Http REST protocol has a main handling logic of:

    Listener listn = new Listener(the configuration information from the configuration file);     incomeList income = new IncomeList( );     while (new_client = listn.listen( )) {     income.push(new_client);     [

After income.push( ), the incomeList creates a read-write thread according to the incoming new_client, and reads and writes data on the application front end. The read-write thread is identified by a requestID, because each request is a socket connection which is disconnected after sending the response, and each request has a unique ID. If the protocol is a long connection or other connection manners, situations are accordingly different. What described above is only suggested.

The read-write thread works as follows.

    // receiving the original data, wherein, for a rest server, the original data is get of http     recvOrigData = restServer.recv( );     // translating the original data into the data in the universal format     organizeData = restServer.translateOrigdata(recvOrigData);     // putting into a queue, and then being taken from the queue by the controller for handling     recvList.put(organizeData);     ]     // continuing waiting for a next service request     }

An account manager is a query database for checking whether an account and a password are correct or not.

The session processor has the sessionId which is for supporting the session or a single sign-on. An interior of the session processor supports a plurality of service types, such as supporting both a gcloud access and the computer room management. Different service types connect different function modules according to an instruction of the configuration file, so as to handle the request of the application front end. For example, a security auditing is required for an operation to the gcloud, but not required for the computer room management.

    // pointing to the existing session, wherein organizedData is the data generated through handling by the receiver     Session sess = sessManager(organizedData);     if (sess.checkService(organizedData)) == service does not exist) {     //     sess.setError(organizedData, service does not exist);     return organizedData;     }     else {     if (sess.ServiceBeenExist(organizedData)) {     // if the service type of the request of the application front end already exists (the handling chain already exists), it is unnecessary to create a new handling chain     }     else {     sess.makeNewServiceType(getServiceType(organizedData), the configuration information from the configuration file);     }     return sess.handle(organizedData);     // If handling of the function module is normal, the handled organizedData is sent by the session processor to the next function module for handling. If the handling of the function module is abnormal, the session processor stops working and sends error information and other related information to the controller for handling.     // If each function module finishes handling the organizedData without error, the session processor sends a final result to the controller for handling.     // The session processor is merely responsible for coordinating a handling process among each function module, not for handling the data. The session processor merely has a concept of: succeeding in handling the data or failing in handling the data.     }

The returned organizedData is sent to the controller of the access layer by the session processor and then handled in accordance with a judgment. If the session processor fails in handling the organizedData, the organizedData is sent to the receiver and an error response is returned to the client from the Listener. If the session processor succeeds in handling the organizedData, the organizedData is sent to the repeater for transmitting.

    [     // handling by the controller as follows     if (handleOK(organizedData)) {     // sending the organizedData to the repeater, and then sending to the background by the repeater for handling     // blocking waiting until timeout     response = repeater(organizedData, timeout);     // sending the data returned from the application back end, to the receiver, and then sending to the application front end by the receiver     receiver.sendResponse(response);     }     else {     // constructing return information based on a handling result     response = constructResponse(organizedData);     // sending the response information by the receiver     receiver.sendResponse(response;)     }     // supporting, finishing the response to the request     ].

One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.

It will thus be seen that the objects of the present invention have been fully and effectively accomplished. Its embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims. 

1-9. (canceled) 10: A service-based message access layer frame, comprising: a controller, a receiver, an account password checker, a session processor and a repeater, wherein: said controller comprises a configuration file parser and a database access service; said controller is for initiating, initializing and coordinating said receiver, said account password checker, said session processor and said repeater; said receiver is for receiving a request of an application front end in various forms; after receiving data in different formats, said receiver translates the received data in the different formats into data in a consistent format and then sends the data in the consistent formation to said session processor; said account password checker is for controlling and validating an access of the request of the application front end and thereafter sending the request to said repeater; said session processor, serving as a main handling module of said whole service-based message access layer frame, is for handling the request with a login management, a rights management, a behavior auditing, a log, a single sing-on and interface exposing; and said repeater is for translating the handled data in the consistent format into data acceptable to an application back end, and then sending the data acceptable to the application back end to the application back end to be handled by cloud. 11: The service-based message access layer frame, as recited in claim 10, wherein the request of the application front end comes from a web front end or a client of a customized application layer protocol. 12: A method for implementing a service-based message access layer frame, comprising steps of: (1) after initiating a system, parsing a configuration file, initiating a database access service, and initializing and initiating a receiver, an account password checker, a session processor and a repeater of the service-based message access layer frame by a controller; (2) after an application front end sends a request, receiving the request of the application front end, translating the request of the application front end into data in a consistent format and sending the data in the consistent format to the session processor by the receiver; (3) handling a client request and sending the handled client request to the repeater, by the account password checker and the session processor which serve as main information handling modules of the frame; and (4) translating the handled data in the consistent format into data acceptable to an application back end, and then sending the data acceptable to the application back end to the application back end for a data handling by cloud, by the repeater. 13: method for implementing the service-based message access layer frame, as recited in claim 12, wherein a working process of the controller comprises steps of: (a) reading and parsing the configuration file; initiating the receiver according to the configuration file, wherein the receiver is different in accordance with the different application front ends and depends on a communication protocol of the application front end; (b) initiating the repeater, wherein the repeater is different in accordance with the different application back ends and depends on a communication manner of the application back end; (c) initiating the database access service; initiating the account password checker with a connection provided by the database access service; and obtaining validation information of an account from a database; and (d) finally initiating the session processor which has no session therein initially; and the controller has a handling logic that: a strategy assigned by the configuration file determines which modules the request passes through and how the request is handled; once a problem occurs, a handling chain is stopped and the request is returned to the controller in advance; the controller, according to returned abnormal information, returns a response to the client request in advance through the receiver and finishes a request response. 14: The method for implementing the service-based message access layer frame, as recited in claim 12, wherein the receiver, as a server, continually receives the request of the application front end and, after receiving, assigns a unique identification (ID) to each the request. 15: The method for implementing the service-based message access layer frame, as recited in claim 13, wherein the receiver, as a server, continually receives the request of the application front end and, after receiving, assigns a unique identification (ID) to each the request. 16: The method for implementing the service-based message access layer frame, as recited in claim 12, wherein: the session processor contains connection information from the different application front ends, wherein the connection information is called sessions; and each session is distinguished by a unique ID, sessionId; each application front end is assigned the sessionId after connecting to the message access layer frame for a first time and being checked by the account password checker; and subsequent connections of the application front end must contain the sessionId in the request. 17: The method for implementing the service-based message access layer frame, as recited in claim 13, wherein: the session processor contains connection information from the different application front ends, wherein the connection information is called sessions; and each session is distinguished by a unique ID, sessionId; each application front end is assigned the sessionId after connecting to the message access layer frame for a first time and being checked by the account password checker; and subsequent connections of the application front end must contain the sessionId in the request. 18: The method for implementing the service-based message access layer frame, as recited in claim 14, wherein: the session processor contains connection information from the different application front ends, wherein the connection information is called sessions; and each session is distinguished by a unique ID, sessionId; each application front end is assigned the sessionId after connecting to the message access layer frame for a first time and being checked by the account password checker; and subsequent connections of the application front end must contain the sessionId in the request. 19: The method for implementing the service-based message access layer frame, as recited in claim 15, wherein: the session processor contains connection information from the different application front ends, wherein the connection information is called sessions; and each session is distinguished by a unique ID, sessionId; each application front end is assigned the sessionId after connecting to the message access layer frame for a first time and being checked by the account password checker; and subsequent connections of the application front end must contain the sessionId in the request. 20: The method for implementing the service-based message access layer frame, as recited in claim 12, wherein the step of handling the request comprises steps of: extracting a session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 21: The method for implementing the service-based message access layer frame, as recited in claim 13, wherein the step of handling the request comprises steps of: extracting a session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 22: The method for implementing the service-based message access layer frame, as recited in claim 14, wherein the step of handling the request comprises steps of: extracting a session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 23: The method for implementing the service-based message access layer frame, as recited in claim 15, wherein the step of handling the request comprises steps of: extracting a session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 24: The method for implementing the service-based message access layer frame, as recited in claim 16, wherein the step of handling the request comprises steps of: extracting the session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 25: The method for implementing the service-based message access layer frame, as recited in claim 17, wherein the step of handling the request comprises steps of: extracting the session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 26: The method for implementing the service-based message access layer frame, as recited in claim 18, wherein the step of handling the request comprises steps of: extracting the session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 27: The method for implementing the service-based message access layer frame, as recited in claim 19, wherein the step of handling the request comprises steps of: extracting the session ID from each request and checking whether the session ID already exists by the session processor; if the session ID exists, namely that the session already exists, sending the session to the repeater; if the session ID does not exist, namely that the session is a new session, sending the session to the account password checker for an authentication; if the authentication is failed, directly returning an error code to the application front end without continuing sending the session; if the authentication is passed, registering the session and returning success authentication information to the application front end; and after sending response information, destroying corresponding connection information by the receiver, wherein the receiver is merely responsible for receiving and returning the request; each request is independent; and, once handling of the request is finished, the receiver readily eliminates the corresponding connection information and waits for a next request. 